CN107262529B - Axial lifting mechanism of main shaft of spiral rolling mill - Google Patents
Axial lifting mechanism of main shaft of spiral rolling mill Download PDFInfo
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- CN107262529B CN107262529B CN201710610560.2A CN201710610560A CN107262529B CN 107262529 B CN107262529 B CN 107262529B CN 201710610560 A CN201710610560 A CN 201710610560A CN 107262529 B CN107262529 B CN 107262529B
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- main shaft
- sleeve
- wall
- bearing
- adjusting ring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/16—Adjusting or positioning rolls
- B21B31/18—Adjusting or positioning rolls by moving rolls axially
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Abstract
The invention discloses an axial lifting mechanism of a main shaft of a spiral rolling mill for producing spiral blades, wherein four rows of roller bearings and a bearing sleeve are arranged between the outer wall of the upper section of the main shaft and the inner wall of a main shaft box body, the upper section of the bearing sleeve is coaxially and fixedly sleeved outside the four rows of roller bearings, the lower end of the bearing sleeve extends downwards to the middle section of the main shaft, an adjusting ring, a thrust bearing, a threaded sleeve and a worm wheel which are coaxially sleeved outside the main shaft are sequentially arranged between the middle section of the main shaft and the inner wall of the lower section of the bearing sleeve from top to bottom, the upper end surface of the adjusting ring is tightly contacted with the inner rings of the four rows of roller bearings and the shaft shoulder surface of the main shaft, the lower end surface of the adjusting ring is supported on the upper end surface of the thrust bearing, the lower end surface of the thrust bearing is supported on the upper end surface of the threaded sleeve, the outer wall of, the middle section of the worm wheel is matched with the worm; the axial position of the main shaft can be adjusted simultaneously in the rotating process of the main shaft, and the operation is easy and convenient.
Description
Technical Field
The invention relates to a cold rolling mill for producing helical blades, in particular to an axial lifting mechanism of a main shaft of the cold rolling mill.
Background
The screw conveyor adopting the helical blades is widely applied to the fields of agricultural machinery, grain machinery, constructional engineering machinery, chemical engineering machinery, mining machinery and the like, and is used for conveying materials. The helical blade is generally formed by continuously rolling strip steel by a cold rolling mill, and the main forming method of the continuous cold rolling helical blade is a conical roller different-surface cold rolling forming method. When the helical blade is rolled, the axial position of the conical roller needs to be adjusted, and the axial positions of the conical rollers are different for blades with different specifications. In the existing conical roller adjusting mechanism of a cold rolling mill, a waist-shaped through groove is processed on a frame of the cold rolling mill, two square plates with threaded holes are respectively welded under the through groove, a through hole is formed in a spindle box of the cold rolling mill, a horizontal spindle above the square plates penetrates into the frame and the spindle box, when the adjustment is performed, firstly, the work of the spindle box needs to be stopped, bolts on the square plates below the spindle are respectively rotated, the head of each bolt upwards pushes up the spindle, the spindle rises, and the horizontal spindle drives the whole spindle box to lift, so that the spindle is driven to lift; when the spindle head descends, the bolt is adjusted downwards, and the spindle head descends by means of self weight. The axial lifting mechanism is poor in operability, two persons need to stand on two sides of a rack respectively during adjustment to adjust bolts on two sides simultaneously, otherwise, stress on two sides is uneven, a spindle box is prone to inclining to one side, adjustment is difficult, and operation is labor-consuming and time-consuming.
Disclosure of Invention
The invention aims to solve the problem of difficult adjustment of the lifting of a main shaft of a cold rolling mill for rolling helical blades at present, and provides an axial lifting mechanism of the main shaft of the helical rolling mill, which can easily adjust the axial position of a conical roller.
The technical scheme adopted by the invention for solving the technical problems is as follows: four rows of roller bearings and bearing sleeves are arranged between the outer wall of the upper section of the main shaft and the inner wall of the main shaft box body, the four rows of roller bearings are coaxially sleeved outside the main shaft, the upper section of the bearing sleeve is coaxially and fixedly sleeved outside the four rows of roller bearings, and the lower end of the bearing sleeve extends downwards to the middle section of the main shaft; an adjusting ring, a thrust bearing, a threaded sleeve and a worm gear which are coaxially sleeved outside the main shaft are sequentially arranged between the outer wall of the middle section of the main shaft and the inner wall of the lower section of the bearing sleeve from top to bottom, the upper end face of the adjusting ring is tightly contacted with the shaft shoulder face of the main shaft, the lower end face of the adjusting ring is supported on the upper end face of the thrust bearing, and the lower end face of the thrust bearing is supported on the upper end face of the threaded sleeve; the outer wall of the screw sleeve is connected with the inner wall of the lower section of the bearing sleeve through threads, the upper section of the worm wheel upwards extends into the screw sleeve from bottom to top after passing through a center hole in the lower end face of the bearing sleeve and is connected with the screw sleeve through a spline, the middle section of the worm wheel is matched with the worm, and one end of the worm extends out of the main shaft box body.
Furthermore, a single-row roller bearing is arranged between the outer wall of the lower section of the main shaft and the inner wall of the main shaft box body, and a gap is reserved between the single-row roller bearing and the inner wall of the main shaft box body.
Furthermore, the inner rings of the four-row roller bearings are tightly matched with the main shaft, the outer rings of the four-row roller bearings are tightly matched with the bearing sleeve, and the outer wall of the bearing sleeve is tightly matched with the inner wall of the main shaft box body; the adjusting ring and the thrust bearing are in clearance fit with the main shaft, and a clearance is reserved between the adjusting ring and the inner wall of the bearing sleeve.
The invention adopts the technical scheme to obtain the beneficial effects that:
1. the invention can adjust the axial position of the main shaft simultaneously in the rotating process of the main shaft, and the main shaft can lift and descend while rotating without stopping the work of the main shaft box, thereby having convenient operation and improving the working efficiency.
2. Compared with the existing bolt adjustment, the worm and gear adjusting mechanism is easier and more convenient to operate, can be operated by only one person, cannot cause uneven stress on two sides, and reduces labor intensity. And the worm and gear adjusting mechanism has a self-locking function, so that the axial limit of the main shaft after being adjusted in place can be ensured.
3. The invention drives the main shaft to lift directly instead of driving the main shaft box to lift through the worm gear, the adjusting screw sleeve, the thrust bearing and the like, has more reliable adjustment and does not generate the phenomenon that the main shaft box inclines to one side.
Drawings
FIG. 1 is a sectional view of the internal structure of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
in the figure: 1. a conical roller; 2. a main shaft; 3. four-row roller bearings; 4. a bearing housing; 5. a main shaft box body; 6. an adjustment ring; 7. a thrust bearing; 8. a threaded sleeve; 9. a worm gear; 10. mounting a copper sleeve; 11. a copper bush is arranged; 12. a worm; 13. a single row roller bearing; 14. and a nut.
Detailed Description
Referring to fig. 1, 2 and 3, a main spindle box is mounted on a rolling mill for cold rolling helical blades, the outermost part of the main spindle box is a main spindle box body 5, a main spindle 2 extends upwards out of the main spindle box body 5 from the inside of the main spindle box body 5, and a conical roller 1 is coaxially and fixedly connected with the main spindle box. The lower section of the conical roller 1 is a conical roller shaft and extends into the central hole of the main shaft 2 from top to bottom, and the upper section of the conical roller 1 is a conical head and extends out of the position right above the main shaft 2.
Four-row roller bearings 3 and bearing sleeves 4 are arranged between the outer wall of the upper section of the main shaft 2 and the inner wall of the main shaft box 5, the four-row roller bearings 3 are inner and outer ring separable bearings, the four-row roller bearings 3 are coaxially sleeved outside the main shaft 2, and the upper section of the bearing sleeves 4 is coaxially and fixedly sleeved outside the four-row roller bearings 3. The inner ring of the four-row roller bearing 3 is tightly matched with the main shaft 2, and the outer ring of the four-row roller bearing 3 is tightly matched with the bearing sleeve 4. The outer wall of the bearing sleeve 4 is tightly matched with the inner wall of the main shaft box body 5. The lower end of the bearing sleeve 4 extends downwards until the middle section of the main shaft 2, and a certain gap is formed between the inner wall of the lower section of the bearing sleeve 4 and the outer wall of the main shaft 2.
A single-row roller bearing 13 is arranged between the outer wall of the lower section of the main shaft 2 and the inner wall of the main shaft box 5, the single-row roller bearing 13 is coaxially sleeved outside the main shaft 2, and the single-row roller bearing 13 is matched with the inner wall of the main shaft box 5 in a clearance mode and can axially slide when the main shaft 2 is adjusted to ascend and descend. Fastened with a nut 14 below the single-row roller bearing 13,
an adjusting ring 6, a thrust bearing 7, a threaded sleeve 8 and a worm wheel 9 are sequentially arranged between the outer wall of the middle section of the main shaft 2 and the inner wall of the lower section of the bearing sleeve 4 from top to bottom, and the adjusting ring 6, the thrust bearing 7, the threaded sleeve 8 and the worm wheel 9 are coaxially sleeved outside the main shaft 2.
The lower end face of the inner ring of the four-row roller bearing 3 is in close contact with the upper end face of the adjusting ring 6, the lower end face of the adjusting ring 6 is supported on the upper end face of the thrust bearing 7, and the lower end face of the thrust bearing 7 is supported on the upper end face of the threaded sleeve 8. The inner rings of the adjusting ring 6 and the thrust bearing 7 are in clearance fit with the main shaft 2, and a clearance is reserved between the inner rings and the inner wall of the bearing sleeve 4.
The main shaft 2 is provided with a shaft shoulder at the assembly part with the adjusting ring 6, and the outer diameter above the shaft shoulder is larger than the outer diameter below the shaft shoulder, so that the adjusting ring 6 also props against the shaft shoulder surface, and the adjusting ring 6 is simultaneously and tightly contacted with the inner rings of the four-row roller bearing 3 and the shaft shoulder surface of the main shaft 2 in the axial direction.
The outer wall of the threaded sleeve 8 is provided with external threads, the inner wall of the lower section of the bearing sleeve 4 is provided with internal threads, and the threaded sleeve 8 is connected with the bearing sleeve 4 through threads. The threaded sleeve 8 is integrally positioned in the bearing sleeve 4, the inner diameter of the threaded sleeve 8 is far larger than the outer diameter of the main shaft 2, and a radial gap is reserved between the threaded sleeve 8 and the main shaft 2.
The upper segment of worm wheel 9 is from supreme upwards stretching into swivel nut 8 behind the lower terminal surface centre bore of bearing housing 4 down, and the upper segment outer wall processing of worm wheel 9 has external splines, and the processing of the lower terminal surface centre through-hole department of swivel nut 8 has internal splines, and the upper segment of worm wheel 9 and swivel nut 8 pass through spline fixed connection. The inner wall of the worm wheel 9 is fitted with the main shaft 2 with a clearance. The worm wheel 9 is sleeved outside the main shaft 2 and is in clearance fit with the main shaft 2. An upper copper bush 10 is sleeved between the worm wheel 9 and the lower end face center hole of the bearing bush 4.
The middle section and the lower section of the worm wheel 9 are both outside the bearing sleeve 4 and inside the main shaft box 5. The middle section of the worm wheel 9 is matched and connected with a worm 12, the central axis of the worm 12 is vertical to the central axis of the worm 12 in space, one end of the worm 12 extends out of the main spindle box 5, and the end is in a square head structure and can be matched with a wrench. A lower copper sleeve 10 is sleeved between the lower section of the worm wheel 9 and the inner wall of the main spindle box 5, so that the worm wheel 9 is axially positioned in the main spindle box 5 through the upper copper sleeve 10 and the lower copper sleeve 10, and the upper copper sleeve 10 and the lower copper sleeve 10 are in clearance fit with the main spindle 2 and are tightly matched with the bearing sleeve 4 and the main spindle box 5.
When the invention works, an inner square wrench is sleeved in a square head at one end of a worm 12, the wrench is rotated to drive the worm 12 to rotate, the worm 12 drives a worm wheel 9 to rotate, the worm wheel 9 drives a threaded sleeve 8 to rotate under the action of an inner spline and an outer spline, the threaded sleeve 8 is lifted along a bearing sleeve 4 under the action of a thread, so that a thrust bearing 7 and an adjusting ring 6 above the threaded sleeve are driven to lift, the adjusting ring 6 drives a main shaft 2 to lift through a shaft shoulder of the main shaft 2, and the adjusting ring 6 finally drives a conical roller 1 to lift axially because inner rings of four rows of roller bearings 3 can be separated. The mechanism composed of the worm wheel 9 and the worm 12 has a self-locking function, so that the axial limit of the main shaft 2 can be ensured.
Claims (3)
1. An axial lifting mechanism of a main shaft of a spiral rolling mill is characterized in that: four rows of roller bearings (3) and bearing sleeves (4) are arranged between the outer wall of the upper section of the main shaft (2) and the inner wall of the main shaft box body (5), the four rows of roller bearings (3) are coaxially sleeved outside the main shaft (2), the upper section of the bearing sleeve (4) is coaxially and fixedly sleeved outside the four rows of roller bearings (3), and the lower end of the bearing sleeve (4) extends downwards until the middle section of the main shaft (2); an adjusting ring (6), a thrust bearing (7), a threaded sleeve (8) and a worm gear (9) which are coaxially sleeved outside the main shaft (2) are sequentially arranged between the outer wall of the middle section of the main shaft (2) and the inner wall of the lower section of the bearing sleeve (4) from top to bottom, the upper end face of the adjusting ring (6) is in close contact with the shaft shoulder face of the main shaft (2), the lower end face of the adjusting ring (6) is supported on the upper end face of the thrust bearing (7), and the lower end face of the thrust bearing (7) is supported on the upper end face of the threaded sleeve (8); the outer wall of the screw sleeve (8) is connected with the inner wall of the lower section of the bearing sleeve (4) through threads, the upper section of the worm wheel (9) passes through a central hole in the lower end face of the bearing sleeve (4) from bottom to top and then extends upwards into the screw sleeve (8) and is connected with the screw sleeve (8) through a spline, the middle section of the worm wheel (9) is matched with the worm (12), and one end of the worm (12) extends out of the main spindle box body (5); a single-row roller bearing (13) is arranged between the outer wall of the lower section of the main shaft (2) and the inner wall of the main shaft box body (5), and a gap is reserved between the single-row roller bearing (13) and the inner wall of the main shaft box body (5); the inner ring of the four-row roller bearing (3) is tightly matched with the main shaft (2), the outer ring of the four-row roller bearing is tightly matched with the bearing sleeve (4), and the outer wall of the bearing sleeve (4) is tightly matched with the inner wall of the main shaft box body (5); the adjusting ring (6) and the thrust bearing (7) are in clearance fit with the main shaft (2), and a clearance is reserved between the adjusting ring and the inner wall of the bearing sleeve (4); a shaft shoulder is arranged at the assembly position of the main shaft (2) and the adjusting ring (6), the outer diameter above the shaft shoulder is larger than the outer diameter below the shaft shoulder, and the adjusting ring (6) is pressed against the surface of the shaft shoulder; the threaded sleeve (8) is positioned in the bearing sleeve (4), and the inner diameter of the threaded sleeve (8) is larger than the outer diameter of the main shaft (2).
2. The axial elevating mechanism of a main shaft of a helical rolling mill as set forth in claim 1, wherein: the worm wheel (9) is in clearance fit with the spindle (2), an upper copper sleeve (10) is sleeved between the worm wheel (9) and the bearing sleeve (4), a lower copper sleeve (10) is sleeved between the lower section of the worm wheel (9) and the inner wall of the spindle box body (5), the upper copper sleeve (10) and the lower copper sleeve (10) are in clearance fit with the spindle (2), the upper copper sleeve (10) is in close fit with the bearing sleeve (4), and the lower copper sleeve (10) is in close fit with the spindle box body (5).
3. The axial elevating mechanism of a main shaft of a helical rolling mill as set forth in claim 1, wherein: the end of the worm (12) extending out of the main spindle box body (5) is provided with a square head which can be matched with a wrench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710610560.2A CN107262529B (en) | 2017-07-25 | 2017-07-25 | Axial lifting mechanism of main shaft of spiral rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710610560.2A CN107262529B (en) | 2017-07-25 | 2017-07-25 | Axial lifting mechanism of main shaft of spiral rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107262529A CN107262529A (en) | 2017-10-20 |
| CN107262529B true CN107262529B (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710610560.2A Active CN107262529B (en) | 2017-07-25 | 2017-07-25 | Axial lifting mechanism of main shaft of spiral rolling mill |
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| CN (1) | CN107262529B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111112340A (en) * | 2019-12-05 | 2020-05-08 | 大连富地重工机械制造有限公司 | Adjusting device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1092796A (en) * | 1965-03-06 | 1967-11-29 | Schloemann Ag | Improvements in means for adjusting the relative positions of the circular blades ofedge-trimming shears |
| CN2122010U (en) * | 1992-03-04 | 1992-11-18 | 冶金工业部北京钢铁设计研究总院 | Axially regulating device for roller of rolling mill |
| CN2249135Y (en) * | 1996-05-09 | 1997-03-12 | 冶金工业部重庆钢铁设计研究院 | Axial adjusting device for rolling mill |
| CN201603741U (en) * | 2010-01-28 | 2010-10-13 | 北京京诚瑞信长材工程技术有限公司 | Reversible two-high reversible rolling mill |
| CN203764645U (en) * | 2014-02-27 | 2014-08-13 | 贵州惠波机械制造有限公司 | Bearing clearance regulating device for rollers |
-
2017
- 2017-07-25 CN CN201710610560.2A patent/CN107262529B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1092796A (en) * | 1965-03-06 | 1967-11-29 | Schloemann Ag | Improvements in means for adjusting the relative positions of the circular blades ofedge-trimming shears |
| CN2122010U (en) * | 1992-03-04 | 1992-11-18 | 冶金工业部北京钢铁设计研究总院 | Axially regulating device for roller of rolling mill |
| CN2249135Y (en) * | 1996-05-09 | 1997-03-12 | 冶金工业部重庆钢铁设计研究院 | Axial adjusting device for rolling mill |
| CN201603741U (en) * | 2010-01-28 | 2010-10-13 | 北京京诚瑞信长材工程技术有限公司 | Reversible two-high reversible rolling mill |
| CN203764645U (en) * | 2014-02-27 | 2014-08-13 | 贵州惠波机械制造有限公司 | Bearing clearance regulating device for rollers |
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| Publication number | Publication date |
|---|---|
| CN107262529A (en) | 2017-10-20 |
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